Pump driven by an electromotor and method for producing a pump of this type

• US 20040062664A1
• Filed: 11/03/2003
• Published: 04/01/2004
• Est. Priority Date: 10/25/2000
• Status: Abandoned Application

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Melzer, Frank, Zierer, Gerald, Rocklage, Gerta, Neumann, Uwe, Linde, Hansjuergen, Weigold, Thomas, Riehl, Guenther, Heidrich, Torsten, Pfetzer, Johannes, Henschel, Matthias, Rehklau, Andreas, Schmitz, Matthias
• Application Number:
  US10/168,902
• Publication Number:
  US 20040062664A1
• Time in Patent Office: Days
• US Class Current: 417/357
• CPC Class Codes: F04C 15/0061 Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions
• CPC Class Codes: F04C 15/008 Prime movers
• CPC Class Codes: F04D 13/0626 Details of the can
• CPC Class Codes: F04D 13/064 Details of the magnetic circuit
• CPC Class Codes: F04D 13/0686 Mechanical details of the pump control unit pump control F04D15/00
• CPC Class Codes: F04D 29/5813 Cooling the control unit

Abstract

The invention relates to a pump (10), having a pump head (12), which has a pump chamber (11), and having an electric motor (14), which drives the pump head (12) and has a stator (40) and a rotor (38), the rotor (38) being connected to the pump head (12) and being disposed in a rotor chamber (82) open toward the pump chamber (11).

It is proposed that the stator (40) is disposed radially around the rotor chamber (82), and the rotor chamber (82) is sealed off from the pump chamber (11) by a sealing wall (51) belonging to the stator (40) and by at least one wall (64) of the pump housing (18).

Claims

1. A pump, having a pump head (12), which has a pump chamber (11), having an electric motor (14), which drives the pump head (12) and has a stator (40) and a rotor (38), the rotor (38) being connected to the pump head (12) and being disposed in a rotor chamber (82) open toward the pump chamber (11), characterized in that the stator (40) is disposed radially around the rotor chamber (82), and the rotor chamber (82) is sealed off from the pump chamber (11) by a sealing wall (51) belonging to the stator (40) and by at least one wall (64) of the pump housing (18).

2. The pump of claim 1, characterized in that the pump head (12), electric motor (14) and an electronic switch mechanism (16) for controlling the electric motor (14) are disposed in a common, in particular three-part pump housing (18).

3. The pump of claim 1 or 2, characterized in that at least one wall (64) defining the rotor chamber (82) is embodied integrally with a motor housing (34) of the electric motor (14).

4. The pump of claim 3, characterized in that the sealing wall (51) defining the rotor chamber (82) radially and belonging to the stator (40) seals off the rotor chamber (82) via elastic sealing means (66).

5. The pump of one of the foregoing claims, characterized in that the sealing wall (51) defining the rotor chamber (82) radially is solidly connected to the stator (40).

6. The pump of claim 5, characterized in that the sealing wall (51) is formed by a casing (50) of the stator (40), the casing being completely closed in the circumferential direction of the rotor chamber (82).

7. The pump of claim 6, characterized in that the casing (50) of the stator (40), the casing being completely closed in the circumferential direction of the rotor chamber (82), is of plastic.

8. The pump of claim 6 or 7, characterized in that pole teeth (44) of the stator (40) are injected into the casing (50) of the stator (40).

9. The pump of claim 7 or 8, characterized in that the plastic casing (50) of the stator (40) is shaped such that it serves as a winding body (54) for stator windings (56).

10. The pump of one of the foregoing claims, characterized in that the stator (40) is connected to the wall (64) of the motor housing (34).

11. The pump of one of the foregoing claims, characterized in that at least one wall (64) enclosing the switch mechanism (16) is embodied integrally with the motor housing (34).

12. The pump of one of the foregoing claims, characterized in that at least one electronic component (96) of the switch mechanism (16) is disposed on a cooling wall (65) that is cooled by a pumping medium.

13. The pump of claims 11 and 12, characterized in that the cooling wall (65) is one wall (64) of the motor housing (34).

14. The pump of claim 12 or 13, characterized in that a volumetric flow of the pumping medium flows from the compression side of the pump head (12) past the cooling wall (65) to the intake side of the pump head (12).

15. The pump of one of the foregoing claims, characterized in that the electronic switch mechanism (16) is mounted on the opposite end of the motor housing (34) from the pump head (12).

16. The pump of one of the foregoing claims, characterized in that the shaft of the electric motor (14) is simultaneously the drive shaft (20) of the pump head (12).

17. The pump of claim 16, characterized in that the pumping medium flows through a conduit (92) in the drive shaft (20) of the motor (14) to the intake side.

18. The pump of one of the foregoing claims, characterized in that the electric motor (14) is an electronically commutated direct-current motor.

19. The pump of one of the foregoing claims, characterized in that the pump is water pump for use in motor vehicles.

20. A method for producing a pump (10), in particular a fluid pump for the coolant or heating loop of a motor vehicle, in which the pump (10) has a pump head (12) and an electric motor (14) with a stator (40) and a rotor (38), characterized in that the stator (40) of the electric motor (14) that drives the pump head (12) is produced by spray-coating stator pole teeth (44), in particular with a plastic;

and that upon injection of the stator pole teeth (44) into the plastic, the plastic casing (50) is shaped such that the stator pole teeth (44) come to be seated in a manner secure against relative rotation and firmly in the plastic casing (50);

the plastic casing (50) is shaped as a carrier (54) of the stator windings (56); and

the plastic casing (50) can seal off the stator (40) from the rotor chamber (82) of the electric motor (14), which rotor chamber is open toward the pumping medium.